show that one can use only the first argument in BooleanFragments

demos/boolean/compsolid.geo

 SetFactory("OpenCASCADE");
 
 //Mesh.Algorithm = 6;
-Mesh.CharacteristicLengthMin = 0.1;
-Mesh.CharacteristicLengthMax = 0.1;
+Mesh.CharacteristicLengthMin = 0.2;
+Mesh.CharacteristicLengthMax = 0.2;
 
 DefineConstant[
   x = {0, Min -5, Max 5, Step 0.1, Name "Bloc 1/0x"}
@@ -22,7 +22,7 @@ DefineConstant[
 Box(1) = {x,y,z, dx,dy,dz};
 Box(2) = {x2,y2,z2, dx2,dy2,dz2};
 
-f() = BooleanFragments { Volume{1}; Delete; }{ Volume{2}; Delete; };
+f() = BooleanFragments { Volume{1,2}; Delete; }{};
 
 Printf("Resulting elementary entities:");
 For i In {0:#f()-1}

demos/boolean/compsolid2.geo

 SetFactory("OpenCASCADE");
 
 //Mesh.Algorithm = 6;
-Mesh.CharacteristicLengthMin = 0.1;
-Mesh.CharacteristicLengthMax = 0.1;
+Mesh.CharacteristicLengthMin = 0.2;
+Mesh.CharacteristicLengthMax = 0.2;
 
 DefineConstant[
   sph = {0, Choices{0,1}, Name "Make sphere a single volume"}
@@ -15,7 +15,7 @@ Box(1) = {0,0,0, 2,2,2};
 Sphere(2) = {xx, 1, 1, rr};
 Box(3) = {2,0,0, 2,2,2};
 
-f() = BooleanFragments { Volume{1}; Delete; }{ Volume{2,3}; Delete; };
+f() = BooleanFragments { Volume{1:3}; Delete; }{};
 Printf("f()", f());
 If(sph)
   tol = 1e-3;

demos/boolean/extrude.geo

@@ -36,9 +36,9 @@ DefineConstant[
 If(order == 0)
   Extrude{0,0,0.3}{ Surface{1:3}; }
   Delete{ Surface{1:3}; }
-  BooleanFragments{ Volume{1}; Delete; }{ Volume{2:3}; Delete; }
+  BooleanFragments{ Volume{1:3}; Delete; }{}
 Else
-  BooleanFragments{ Surface{1}; Delete; }{ Surface{2:3}; Delete; }
+  BooleanFragments{ Surface{1:3}; Delete; }{}
   a() = Extrude{0,0,0.3}{ Surface{1:5}; };
   Printf("returned entities (top, body, laterals, etc.) = ", a());
 EndIf

demos/boolean/extrude2.geo

@@ -28,7 +28,7 @@ Plane Surface(2) = {2};
 
 Disk(3) = {0.6, 0.6, 0, 0.5, 0.3};
 
-BooleanFragments{ Surface{1}; Delete; }{ Surface{2:3}; Delete; }
+BooleanFragments{ Surface{1:3}; Delete; }{}
 
 rec = DefineNumber[1, Choices{0,1}, Name "recombine into prisms?"];
 Extrude{0,0,0.3}{ Surface{1:5}; Layers{5}; Recombine rec; }

demos/boolean/fragment_numbering.geo

@@ -29,6 +29,6 @@ EndFor
 
 Printf("disk tags: ", b());
 
-c() = BooleanFragments{ Line{t}; Surface{1:6}; Delete; }{ Surface{b()}; Delete; };
+c() = BooleanFragments{ Line{t}; Surface{1:6,b()}; Delete; }{};
 
 Printf("all tags (disk and top line tags should be unchanged!): ", c());

demos/boolean/import.geo

@@ -19,7 +19,7 @@ If(sph)
 EndIf
 
 
-r() = BooleanFragments{ Volume{a()}; Delete; }{ Volume{b()}; Delete; };
+r() = BooleanFragments{ Volume{a(),b()}; Delete; }{};
 
 //Recursive Color SteelBlue { Volume{r()}; }
 

demos/boolean/revolve.geo

@@ -32,5 +32,5 @@ DefineConstant[
   angle = {90, Min 1, Max 360, Step 1,
     Name "Parameters/Angle"}
 ];
-BooleanFragments{ Surface{1}; Delete; }{ Surface{2:3}; Delete; }
+BooleanFragments{ Surface{1:3}; Delete; }{}
 a() = Extrude{ {0,1,0}, {0,0,0}, angle*2*Pi/360 }{ Surface{1:5}; };

demos/boolean/revolve2.geo

@@ -32,6 +32,5 @@ DefineConstant[
   angle = {90, Min 1, Max 360, Step 1,
     Name "Parameters/Angle"}
 ];
-BooleanFragments{ Surface{1}; Delete; }{ Surface{2:3}; Delete; }
+BooleanFragments{ Surface{1:3}; Delete; }{}
 Extrude{ {0,1,0}, {0,0,0}, angle*2*Pi/360 }{ Surface{1:5}; Layers{10}; Recombine; }
-

demos/boolean/simple3.geo

@@ -27,4 +27,4 @@ Line Loop(2) = {5,6,7,8};
 Plane Surface(2) = {2};
 
 Disk(3) = {0.6, 0.6, 0, 0.5, 0.3};
-BooleanFragments{ Surface{1}; Delete; }{ Surface{2,3}; Delete; }
+BooleanFragments{ Surface{1:3}; Delete; }{}

demos/boolean/simple4.geo

@@ -31,4 +31,4 @@ Surface Loop(1) = {1,2,3,4,5};
 Volume(1) = {1};
 
 Cylinder(2) = {0.5,0.5,-0.5, 0,0,2, 0.2};
-BooleanFragments{ Volume{1}; Delete; }{ Volume{2}; Delete; }
+BooleanFragments{ Volume{1,2}; Delete; }{}

demos/boolean/transform.geo

@@ -26,6 +26,6 @@ Translate{0.2,0.2,0.2}{ Volume{1}; }
 Rotate { {1,0,0}, {0,0,0}, Pi/3 } { Volume{1}; }
 Rotate { {0,1,0}, {0,0,0}, Pi/3 } { Volume{1}; }
 
-f() = BooleanFragments { Volume{1}; Delete; }{ Volume{2}; Delete; };
+f() = BooleanFragments { Volume{1,2}; Delete; }{};
 
 Translate{4,0,0}{ Duplicata{ Volume{1/*,2,3*/}; } }